METHOD STATEMENT Purpose: The purpose of the method statement is to describe the sequence and methodology for the installation of Gypsum Board Ceiling, Gypsum Partitions, Ceiling Tiles.
Scope: Supply & apply false ceiling & partitions works as following:
Gypsum Board & Gypsum Bulkhead
Ceiling Tiles.
Gypsum Partitions. Reference:
Contract drawing reference as following:
Approved shop drawings as following:
Main Contract.
Definitions and abbreviations Contractor - Main contractor (AL-Habtoor / Murray & Roberts). PM - Main Contractor Project Manager CM - Main Contractor Construction Manager P.E - Main Contractor Project Engineer SE - Main Contractor Section Engineer QCE - Main Contractor Quality Control Engineer SM - Main Contractor Safety Manager SO -Main Contractor Safety Officer SR - Main Contractor Surveyor SF - Main Contractor Section Foreman
PM,v - Vancouver Project Manager. CM,v - Vancouver Construction Manager. PE,v - Vancouver Project Engineer. QCP - Quality Control Procedure ITP - Inspection and Test Plan ITL - Independent Test Laboratory MS - Method Statement FM - Form NCR - Non Conformance Report ITR - Inspection & Test Request WIR - Work Inspection Request
Responsibilities: The site operation activities and control are executed by the following, with their corresponding roles and supervision responsibilities:
The Project Manager and Construction Manager are responsible for the overall management of the work and control of the staff in executing the work, as per relevant documents called for in this method statement.
The Project and Site Engineers shall be responsible for on-site activities and supervision of temporary Scaffolding, required tools and related construction activities.
Competent QC Engineer/Inspector shall be responsible for checking and inspecting the execution of the works in accordance with the approved materials, approved method statement and the inspection and tests plan.
The QA/QC Manager is responsible for ensuring the quality standards of the works as per the Engineer Instruction and the specification requirements.
The Safety Officer shall be responsible for monitoring of the work activities, to ensure safe system
of work are followed, the required precautions implemented, i.e. Scaffolding system, and PPE tools and related work practices. Procedures: 6.1 General Requirements for false ceiling & PARTITIONS Installation.
All joints shall be filled and tape properly after using joint mesh.
Partitions lay out should be inspected by Main contractor before starting truck fixation.
Partition type should be identified before starting the work in each area.
Partition works should be coordinated properly with M.E.P subcontractor specially after fixing our structural framing and just before closing the second layer of board.
Gypsum Board should be fixed staggering in same horizontal level.
All joints tape shall be even and shall not exceed the level of board by removing paper from the edge which doesn’t have sloped edges but not for chamfered edge which already to receive filling materials.
Where applicable, provide bulkhead as indicated on the approved shop drawing.
Where applicable, provide curtain box/ divider box as indicated on the approved shop drawing.
The tiles cut piece shall be carried out as per the approved shop drawing and shall not be less than 30 cm (not less than half tile).
The tiles cutting and formulation of cut piece shall be formed by using suitable cutting machine to avoid any irregular edges for the cut pieces.
All necessary coordination with the mechanical and electrical works shall be carried out in three stages:
Before starting suspended GI Furring ceiling system.
Before fixing Gypsum board.
After fixing Gypsum board.
Coordinate the finish Ceiling level with the adjacent levels, and adjacent window.
The installation of the tiles and the Gypsum Board shall be subjected to the construction drawing, the approved shop drawing, and mock-up to be done.
Bulkhead edges and corners shall be provided with proprietary coved mesh accessories with nice finish tapped.
All coordination process should be supported by formal clearance letter from M.E.P. subcontractor in all stages, main contractor and final approval from the consultant.
Any temporary opening required by M.E.P. should be by marking on gypsum board before finishing stages.(Joint Treatment)
6.2 gypsum board false ceiling 6.2.1 Preparation prior to installation.
Site survey by our engineer to assure the work is ready to start accordingly.
Obtain M.E.P. clearance by formal letter from Main Contractor Coordinator.
Checked by our engineer if the level of shop drawings is approved for matching with the site condition after M.E.P. service had been installed.
Any materials at slab concrete soffit base incompatible with the support shall be removed by main contractor.
All block works, plaster, at least primer paint, to be completed till the slab soffit.
Fire sealant to be applied wherever applicable.
6.2.2 Fixation Suspension System (70 % of job):
Fixing the wall angle by (Hilty Gun steel nail) to the wall matching the level which had been marked before starting the fixation.
Submit first WIR-1 for approval.
Fix the Main channel supported from sofit of lab using Hilti Material fixation (X-CC DNI 27 P8) as approved in our submittal from engineer.
Horizontal main channel fixing to dropped supported from top by using ½” (Hilti)
Furring channel fixing to horizontal main channel perpendicularly by ½” white screw DD 02 (Hilti)
Approval for suspended system ceiling should be obtained from the engineer after inspected from Q/C engineer, and the consultant.
All MEP Access panels required to be marked on the slab soffit for the engineer’s approvals.
Acceptance latter from M.E.P. subcontractor to satisfy that all support should not object any M.E.P. services in future.
Submit second WIR-2 for approval.
6.2.3 Fixation of Gypsum Board (30 % of job).
white screw DD 02
After obtaining M.E.P. clearance and engineer approval.
Fixing Gypsum board stagger on furring channel by using 1” drywall gypsum screw (Hilti) using the required accessories and metal angles as approved materials and shop drawings.
M.E.P. subcontractor should mark all M.E.P. services which it need to cut with its tag for each opening.
Submit third WIR-3 for approval, Got formal approval for marking from engineer before start the cutting.
After cutting only, we can start joint treatment and assuring that the joint level should not exceed the board level.
If required in joint area, paper should be removed and hanging the board before treatment with the joint compound.
In same time of filling joint compound (Boral), Joint mesh (Boral), should be fixed and matching same level of Gypsum Board Ceiling.
Gypsum ceiling ready for engineer inspection.
Submit forth WIR-4 for approval
6.3 Ceiling Tiles (Metal & Mineral Fiber):
6.3.1 Preparation prior to installation.
Obtain M.E.P. clearance by formal later from Al Habtoor / Murray & Roberts Coordinator.
Checked by our engineer if the level is approved shop drawings are matching with the site condition after M.E.P. service had been installed.
Any materials at slab concrete suffix base incompatible with the support shall be removed by main contractor.
6.3.2 Fixation Suspended Ceiling (60 % of job):
Fixing the wall angle by (Hilty Gun steel nail) to the wall matching the level which had been marked before starting the fixation.
Submit first WIR-1 for approval
Fixing the main tee angle by 3mm hanging wire Supported from sofit of slab using Hilti Material fixation (Hilti Ceiling Clip) with the steel nail along with adjustable clip as approved in our submittal from engineer.
Fixing with the cross tee angle perpendicularly with main tee.
Acceptance latter from M.E.P. subcontractor to satisfy that all support should not object any M.E.P. services.
Submit second WIR-2 for approval.
Approval for Suspended System Ceiling should be obtained from the engineer
6.3.3 Fixation Gypsum Tile (40 % of the job):
Lay the Gypsum tile.
Mark all M.E.P. services which have to be cut before fixing the tiles.
Cutting tiles opening accordingly to M.E.P. subcontractors and hold in store until permission to fix.
Fixing and cutting in proper way of tiles as per approved shop drawings.
Before announcing the final inspection, all tiles should be installed.
False Ceiling tiles will be ready for engineer inspection.
Submit second WIR-3 for approval. 6.4 Gypsum Partitions: 6.4.1 Preparation prior to installation.
Survey by our engineer to assure the work is ready to start accordingly.
Partitions Lay out should be marked on the floor by our engineering team.
Any materials at slab concrete incompatible with the support truck should removed by main contractor.
Cleared approved shop drawings for partitions type’s & partitions lay out should be available with our construction manager and project engineer at site.
6.4.2 Fixation Suspension System (70 % of job):
Submit first WIR-1 for Lay out approval.
Fixing the truck by (Hilty Gun steel nail) to the floor matching the approved lay out on the floor which had been marked before starting the fixation.
Fix the first and last vertical stud only for each expected wall partition and in same time fix the top truck also for check alignment and verticality assurance.
Continue fixing stud channel 400 mm c/c fixing to top and bottom truck supported by using ½” white screw DD 02 (Hilti) and paralleled to basic stud which will be ad bench mark for it.
Horizontal truck channel fixing as support for stud each 1200 mm as standard for two purposes, structural and to get raw cool insulation.
Around openings doors and windows should be taken in considerations for extra support channels, as horizontal truck and vertical stud in position to receive flat faces, and to provide white wood fillet 50 mm as required to receive support screws.
Approval for structure framing partition system should be obtained from the engineer after inspected from Q/C engineer, and the consultant WIR-2.
Our site engineering team will give enough time and coordination for M.EP Subcontractor to start his work in this critical time to fix his pipes and conduits.
All MEP Access panels which it might be required to be marked on the structural framing to give us chance for sufficient support in this stage.
Acceptance latter from M.E.P. subcontractor to satisfy that all support should not object any M.E.P. services in future.
Submit second WIR-3 for approval as M.E.P works has been finished successfully.
6.4.3 Fixation of Gypsum Board (30 % of job).
After obtaining M.E.P. clearance and engineer approval.
Fixing one layer only Gypsum board stagger on stud channel by using 1” drywall gypsum screw (Hilti) using the required accessories and metal angles as approved materials and shop drawings.
M.E.P. subcontractor should mark all M.E.P. services which it need to cut with its tag for each opening.
Submit fourth WIR-4 for approval, Got formal approval for fix second layer gypsum board from engineer before closing the partition.
After cutting only, we can start joint treatment and assuring that the joint level should not exceed the board level.
If required in joint area, paper should be removed and hanging the board before treatment with the joint compound.
In same time of filling joint compound (Boral), Joint mesh (Boral), should be fixed and matching same level of Gypsum Board Ceiling.
Gypsum ceiling ready for engineer inspection.
Submit fifth WIR-5 for approval.
In case of double layers board, we can hold the second layer fixing up to final stage of works to
avoid any damages it might be happens.
So same procedures of finishing board we can go throw and to do WIR as well.
6.5 Protection of finished works
After the final inspection for Gypsum Board Ceiling, and Gypsum Partition walls just to care that nothing to spoil the surfaces as much as possible especially from M.E.P. subcontractor.
We recommend not starting final finish touch unless we assure that M.E.P subcontractor had been successfully finished his works.
For double layers gypsum partitions we recommend that to hold the second layer of board fixing up to final stage.
7. Quality Control:
Significant stages of work shall be ensured by Project Engineer, Site Engineer and QA/QC Engineer to be conforming to the Engineer requirement and QA/QC procedures including the setting out and application of the recommended materials mentioned in this method statement and as per inspection and test plan (ITP)
Inspection Request (WIR) shall be submitted for checking the different items stated in this method statement as follows:
Gypsum Partition: Preparation before Structural framing channels including MEP clearance, surveying lay out and approved level in wet areas for proceeding with fixation, as per method statement (WIR-1) (WIR-2) (WIR-3) (WIR-4) (WIR-5).
Gypsum Board: Preparation before suspended ceiling including MEP clearance, surveying lay out and approved plastering works for proceeding with tile fixation, as per method statement (WIR-1) (WIR-2) (WIR3) (WIR-4).
Ceiling Tiles: Preparation before suspended ceiling including MEP clearance, surveying lay out and approved plastering works for proceeding with tile fixation. (WIR-1). (WIR-2) (WIR-3)
8. Safety:
Proper scaffolding shall be used and safety harness to be used and secured, if required.
All personal protective equipment shall be used as appropriate according to the nature of the job.
Housekeeping shall be of good standard and all of cuts and spills shall be removed.
Safety belt if required in high level of ceiling.
Scaffolding tag should be provided while using.
110 V electrical machines should be used
